Today’s game has been overshadowed by the state of the surface at Beijing’s Bird’s Nest Stadium following torrential storms last week.
The teams were forced to re-schedule their training sessions yesterday to the nearby Olympic Sports Centre Stadium.
And United manager Mourinho and City boss Guardiola revealed they are worried that the pitch could cause damage to key men with the Premier League season starting in three weeks.
New signings like Henrikh Mkhitaryan, Eric Bailly and Nolito are all set to figure tonight as well as players like Sergio Aguero, David Silva, Yaya Toure, Juan Mata and rising star Marcus Rashford.
“If you ask me my objective for the match tomorrow I only have one: Take the players home safe without any kind of injury,” said Mourinho.